For consortiums and other large systems, it would be helpful to have the ability to batch cancel transfers, or cancel more than one at a time. Most likely the easiest place to do this would be on the Transfers to Receive page, where you might be able to add a "Cancel Transfer" checkbox instead of (or in addition to) the button.
Something that would be a super cool addition would be to also have the option to "Cancel and mark lost," but that's probably beyond the scope of a single bug.
We now also have transfers to send. Should this be added to both pages? What's the reason/use case for needing the bulk cancel?
Primarily because as a consortium we send a lot of transfers in bulk. There are times when mistakes are made or boxes go missing, and we have to cancel many transfers at once. However, it's an inconvenience at worst, so this may be better marked as "Trivial" (if that's that the lowest priority level)?
Trivial - blocker are used for errorenous behaviour/problems. I'd say enhancement is right here as it would be a small new feature.